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Reinforced Masonry - Axial Load

Reinforced Masonry - Axial Load

Reinforced Masonry - Axial Load

(OP)
I am studying for the SE exam to be taken next month and took a refresher course in Masonry.

The instructor when checking fa < Fa, used fa = P/An, or the axial load over the gross area of the column.  Also (on another subject) when transforming steel in compression uses Ats = As(n-1).

The SERM examples when checking fa < Fa, use P/At, or the axial load over the transformed area of the column.  When transforming steel in compression uses Ats = As(2n-1) to account for creep.  

My question, which is correct?

RE: Reinforced Masonry - Axial Load

I think either one is okay. I have had the question previously. Check the ARMY reference manual for masonry. They talk about using either n-1 or 2n-1

RE: Reinforced Masonry - Axial Load

(OP)
Thanks, what about the axial stress calculation?

fa = P / An

or

fa = F/ At

RE: Reinforced Masonry - Axial Load

(OP)
I meant fa = P / At

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